<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

// ------------------------------------------------------------------------

/**
 * CSV Helpers
 * Inspiration from PHP Cookbook by David Sklar and Adam Trachtenberg
 *
 * @author		Jérôme Jaglale
 * @link		http://maestric.com/en/doc/php/codeigniter_csv
 */

// ------------------------------------------------------------------------

/**
 * Array to CSV
 *
 * download == "" -> return CSV string
 * download == "toto.csv" -> download file toto.csv
 */
if ( ! function_exists('array_to_csv')) {
    function array_to_csv($array, $download = "") {
        if ($download != "") {
            header('Content-Type: application/csv');
            header('Content-Disposition: attachement; filename="' . $download . '"');
        }

        ob_start();
        $f = fopen('php://output', 'w') or show_error("Can't open php://output");
        $n = 0;
        foreach ($array as $line) {
            $n++;
            if ( ! fputcsv($f, $line)) {
                show_error("Can't write line $n: $line");
            }
        }
        fclose($f) or show_error("Can't close php://output");
        $str = ob_get_contents();
        ob_end_clean();

        if ($download == "") {
            return $str;
        }
        else {
            echo $str;
        }
    }
}

// ------------------------------------------------------------------------

/**
 * Query to CSV
 *
 * download == "" -> return CSV string
 * download == "toto.csv" -> download file toto.csv
 */
if ( ! function_exists('query_to_csv')) {
    function query_to_csv($query, $headers = TRUE, $download = "") {
        if ( ! is_object($query) OR ! method_exists($query, 'list_fields')) {
            show_error('invalid query');
        }

        $array = array();

        if ($headers) {
            $line = array();
            foreach ($query->list_fields() as $name) {
                $line[] = $name;
            }
            $array[] = $line;
        }

        foreach ($query->result_array() as $row) {
            $line = array();
            foreach ($row as $item) {
                $line[] = $item;
            }
            $array[] = $line;
        }

        return array_to_csv($array, $download);
    }
}

/* End of file csv_helper.php */
/* Location: ./system/helpers/csv_helper.php */